Hanger for electric wires



Dec. 11, 1928.

C. A. CAWOOD HANGER FOR ELECTRIC WIRES Filed April 18, 1927 PatentedDec. 11, 1928.

UNITED STATES teesom PATENT OFFICE.

CLARENCE A. CAWOOD, OF BIG STONE GAP, VIRGINIA, ASSIGNOIR, 'lOv THEELECTRIC RAILWAY EQUIPMENT COMPANY, OF CINCINNATI, OHIO, A. CORPORATIONOF OHIO.

HANGER FOR EiJECTRIG WIRES.

Application filed April 18, 1927.

This invention relates to trolley wire suspension fixtures of the typeused in mlnes for suspending overhead electric trolley and feed wiresfrom insulated hangers.

An object of the invention is to reduce the cost of manufacture oftrolley suspension fixtures by so constructing the elements thereof thatthe same elements, or some of the same elements, may be utilized formaking varlous forms of fixtures.

Another object is to so construct the various fixtures that the partsthereof cannot become disassociated from one another by care lesshandling or shipment.

Another object is to provide the fixtures with securing means that maybe actuated by means of an ordinary wrench such as is commonly used inmines.

These and other objects are attained by the means described herein anddisclosed in the accompanying drawings, in which:

Fig. 1 is a side elevational view partly in cross section, showing afixture centrally suspending a feed and a trolley wire.

Fig. 2 is a cross sectional view on line 22 of Fig. 1.

Fig. 3 is a cross sectional view showing a fixture fitted for suspensionat one end thereof.

Fig. 4 is a Fig. 3.

Fig. 5 is a side elevational view of the device shown in Fig. 3.

In the wiringof mines in which electric locomotives are used fortransportation, it is generally the practice to dispose the trolley wirefor the locomotive close to the side wall 8 of the mine passage. Insomemines the feed wire 10 of the trolley system is carried by the samemember supporting the trolley wire, while in others the feed wire issupported from the side wall 8 by separate insulators secured thereto.For the purpose of explanation, it will be assumed that it is desired torewire the latter mine and install fixtures supporting both the 'feedand trolley wires, utilizing the old hangers 11 already secured in themine roof 9.

Because of the force exerted upwardly by a locomotive trolley pole uponthe trolley wire 9, it is desirable to have the trolley wire disposeddirectly below the insulated hanger 11 as disclosed in Fig. 5, ratherthan to one side'of the hanger as shown in Fig. 1 wherein upward forceupon the trolley wire 9 tends detail view of parts shown in Serial No.184,489.

to rock the entire fixture relative to the mine roof. Therefore, inrewiring the mine the structure shown in Fig. 5 is used wherever the oldhanger 11 is disposed sufficiently distant from wall 8. However, shouldthe hang er be disposed close to wall 8 as shown in Fig. 1, the fixtureshown therein would be used, disposing the trolley wire 9 to one side ofhanger llbecause of lack of space between the hanger and wall.

It should be noted that the fixture shown in Fig. 1 is composed of manyof the parts used in'the fixture shown in Fig. 5. By thus making theparts interchangeable, the well known advantages incidental tostandardization of parts are acquired.

The device shown in Fig. 1 wherein the hanger 11 is disposed close toside wall8, comprises a body member 12 having a central boss 13 providedwith a threaded bore 14 for receiving a threadedstud 15 on insulatedhanger 11, by'means of which the body portion may be suspended from theroof. One end of the body member is provided with I an annular boss16having a tapered bore 17 adapted to receive therein correspondinglytapered walls 18 of a pair of jaws 19, which, when drawn upwardly intothe tapered bore, move toward one another for clamping trolley wire 9therebetween. The means for thus drawing the jaws upwardly comprises astud 20 provided at one end withthreads 21'for receiving a threaded nut22, and having at its lower end an annular groove 23 which re-. ceivestherein an annular flange 24: formed within each of the jaws 19.Referring to Fig. 2, when-nut 22 is tightened, the stud is drawnupwardly and the shoulder 25 abutting the face 26 of the flange 24serves to raise the jaw 19 and wedgethe tapered portion 18 into taperedbore 17 whereby the ends 27 of the jaws are clamped upon the trolleywire 9.

The opposite end 28 of'body member 12 is provided with an adjustablefeeder wire clamp comprising a plate 29 having transverse parallelgroves 30 and 31, either of which grooves may cooperate with an up-'wardly extending shoulder 32 on member 12 and with the grooved end 28 ofmember '12 for clamping a trolley wire. Contact of plate 29 on shoulder32 provides a fulcrum for plate 29. The size of a feed wire determineswhich of grooves 30 and 31 is to cooperate with groove or depression 33in member 12 for clamping feed wire 10. The feed wire is clamped inposition by means of a bolt 34 provided with a nut 35. Bolt 34 isreceived in aligned perforations 36 and 37 in plate 29 and member 12respectively. The body l1l811l ber 12 is provided with suitablestrengthening ribs 38 and flanges 39.

The foregoing description refers to the device suspended from thecentrally disposed boss 13 as shown in Figs. 1 and 2, where the hanger11. is so close to wall 8 that mounting the fixture as shown in Fig. 5is impossible. In the event that the distance from the hanger to thewall is sufiiciently great, the fix ture shown in Fig. 5 is preferablyinstalled for the reasons previously mentioned.

The fixture shown in Fig. 5 differs from that of Figs. 1 and 2 only inthat the jaw actuating means of Figs. 1 and 2 is replaced by the meansshown in Figs. 3, 4 and 5, in whichthe jaw actuating means is adapted toreceive the threaded stud of hanger 11. Thus, the trolley wire 9 isdisposed directly below hanger 11 as shown in Fig. 5. The jaw structureshown in Fig. 3 comprises the usual jaws 19 adapted to be drawn upwardlyinto tapered bore 17 of boss 16, and a stud having a lowerend identicalwith that of stud 20. The upper end of stud 40 is bored and threaded asat 41, to receive threaded stud 15 on hanger 11. The upper end is alsoprovided with a hexagonal head 42 adapted to be received in a hollowhexagonal nut 43 swaged onto stud 40 about the head 42 as shown at 44.Shoulder thereby precludes disassociation of the nut 43 from stud 40. Itis obvious that when it is desired to install the device just described,it is necessary only to screw the threaded stud of the hanger into thethreaded bore 41 by turning nut 43, whereupon stud 40 will rotate andadvance up wardly upon stud 15 until nut 43 abuts the lower face 46 ofthe hanger 11 and the top of 'boss 16. The jaws 19 will then be wedgedin the tapered bore 17 for clamping trolley wire 9.

Although the two devices disclosed in Figs. 1 and 5 respectively areintended to be assembled at the manufacturers plant, it should be notedthat by dispensing with shoulder 45 on nut 43, the change fromcenter-suspension to end-suspension could be efiected on the job, ifdesired. It has been found to be more practical, however, to constructfixtures of this kind in a manner such that the various parts thereofcannot be inadvertently disassociated from one another, whereby partsare lost and the fixture becomes useless. It should also be noted thatin assembling the fixtures at the factory, similar body members, feedwire clamps, and trolley wire jaws may be used in both fixtures, asthese parts are interchangeable. This feature makes possible a greatreduction in the cost of manufacture.

It should also be noted that grooves 30 and 31 in plate 29 are ofdifferent radii, and that if desired, )late 29 may be reversed todispose groove 30 into cooperative relationship with depression 33 inmember 12 for clamping feed wires of smaller The groove 31 will thenreceive rib 32 to provide a fulcrum for plate 29.

lVhat is claimed is:

1. In a device of the class described, the con'ibination of a bodymember having a tapered bore at one end thereof and a central threadedbore for receiving a hanger stud, a feeder wire clamp at the oppositeend of the body member, a. pair of trolley clamp jaws associated withthe tapered. bore for clan'iping a trolley wire therebetween, andinterchangeable jaw actuating means, one being adapted for suspendingthe body mem her from the hanger stud, and the other for actuating thejaws independently of the hanger stud.

2. In a device of the class described, the combination of a body memberhaving a tapered bore at one end thereof and a central threaded bore forreceiving a hanger stud, a pair of trolley clamp jaws associated withthe tapered bore fer clamping a trolley wire therebetween, andinterchangeable jaw actuating means, one being adapted for suspendingthe body member from the hanger stud, and the other for actuating thejaws independently of the hanger stud.

3. In a device of the class described, the combination of; an elongatedbody member adapted for n'iountin g it perpendicularly of a stud, saidbody having a tapered bore at its end and a threaded bore intermediateits ends, the threaded here being adapted to receive a hanger stud forsuspending the body member, a trolley wire clamping means mounted in thetapered bore and adapted to be simultaneously secured to a hanger studand to clamp a trolley wire, and a feed wire receiving means at theopposite end of the body member.

4. A wire suspending device adapted for mounting on a stud con'iprisinga body memher having a threaded bore and a tapered bore spacedtherefrom, the threaded bore being adapted to receive a hanger stud forsuspending the body member, clamping aws adapted to be moved intobinding relation with one another upon movement into the tapered boreand means for simultaneously closing the jaws and securing the body to astud.

5. A combined feed and trolley wire clamp comprising an elongated bodyportion having a (ientral threaded bore for receiving a threadedmounting stud, the body portion having a feed wire clamp at its one end,the other end having a bore therethrough for interchangeably receiving atrolley wire clamp arranged for receiving a threaded mounting stud forcooperation therewith for joint mounting of the hanger at said one endand for clamping a trolley wire, and a trolley wire clamp adapted forholding a trolley wire independently of such mounting stud.

6. In a device of the class described the combination of a body memberadapted for selective mounting at an end and intermediate its ends, atrolley clamp means operable tov means and a depression, a feeder wireclamp means for accommodating feeder wires of various sizes, comprisinga reversible clamp plate provided with a. pair of parallel grooves ofdifferent sizes either one of which may cooperate with the abutmentmeans on the body member to provide a pivotal mounting for the plate andthe other of which may cooperate with the depression in the body memberfor receiving and holding a feeder wire, means for retaining the platein clamped position upon the feeder wire, and a clamp on the body memberfor holding a trolley wire.

9. In a device of theclass described, the combination of a body memberprovided with a shoulder and a depression, a feeder wire clamp means foraccommodating feeder wires of various sizes comprising a clamp plateprovided with a pair of parallel grooves of different sizes,'either oneof which is adapted to receive the shoulder on the body member forproviding a pivotal mounting for the plate and the other of which isadapted for cooperation with the depression in the body member forreceiving and holdinga feeder wire, and means for retaining the plate inclamped position upon the shoulder and feeder wire.

10. In a device'of the class described, the combination of a body memberprovided on one end with means for clamping and holding a trolley wire,and feed wire supporting means on the other end of the body membercomprising'an abutment and a jaw, a reversible clamp plate provided withparallel grooves of different sizes, one of which may cooperate with theabutment on the body member for pivotal mounting of the clamp platethereon, and another of which may cooperate with the jaw on the bodymember for receiving and holding a feeder wire of a size correspondingto the size of the groove, and means for retaining theplate in clampedposition upon the feeder wire.

11. In a device of the class described, the combination of an elongatedbody member provided at one end with trolley wire clamping means adaptedto be simultaneousely secured to a hanger stud and to clamp a trolleywire, means disposed centrally of the elon gated body member formounting it on a hanger stud, a feeder wire clamp means on the other endof the body member and adapted for accommodatingfeeder wires of varioussizes,'said clamp means comprising an abutment and a jaw on the bodymember, a reversible clamp plate provided-with grooves of differentsizes, one of which may cooperate with the abutment on the body memberfor pivotal mounting of the plate thereon, and another of which maycooperate with the jaw on the body member for holding a feeder wire of asize corresponding to the size of the groove, and means for retainingthe plate in clamped position upon the feeder wire.

12. In a device of the class described, the combination of a bodymember'adapted for selective mounting at an end and intermediate itsends, and a trolley clamp provided with means for simultaneouslyclamping a trolley wire and mounting the body member at the said end. 7

In testimony whereof, I have hereunto subscribed my name this 4th day ofApril, 1927.

CLARENCE A. CAVVOOD.

